<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'

import { useUserStore } from '../../stores'
const userStore = useUserStore()
import { useRouter } from 'vue-router'
const router = useRouter()

import { userRegisterService, userLoginService } from '../../api/user'

// 通过 true 或者 false 判断展示 注册 / 登录
const isRegister = ref(true)

// 拿到组件实例
const form = ref()

// 注册
const formModel = ref({
  username: '',
  password: '',
  repassword: ''
})

// 自定义校验规则
const validatePass = (rule, value, callback) => {
  if (value === '') {
    callback(new Error('请再次输入密码'))
  } else if (value !== formModel.value.password) {
    callback(new Error('两次输入密码不一致'))
  } else {
    callback()
  }
}

// 声明整个表单规则
const rules = {
  // username: [
  //   { required: true, message: '请输入用户名', trigger: 'blur' },
  //   { min: 3, max: 5, message: '用户名必须是3-5位', trigger: 'blur' }
  // ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{4,8}$/,
      message: '密码必须是4-8的非空字符',
      trigger: 'blur'
    }
  ],
  repassword: [{ validator: validatePass, trigger: 'blur' }]
}

// 注册事件
const register = async () => {
  // 对整个表单内容进行验证
  // await form.value.validate()
  // 发送请求
  await userRegisterService(formModel.value)
  ElMessage.success('注册成功')
  isRegister.value = false
}

// 登录
const login = async () => {
  // 对表单内容进行预校验
  await form.value.validate()
  const res = await userLoginService(formModel.value)
  console.log(res)
  userStore.setToken(res.data.token)
  ElMessage.success('登录成功')
  router.push('/')
}

// 切换时 重置表单内容
watch(isRegister, () => {
  formModel.value = {
    username: '',
    password: '',
    repassword: ''
  }
})
</script>

<template>
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册 -->
      <!-- :model="formModel" 绑定的整个form的数据对象 -->
      <!-- :rules="rules" 绑定的整个的rules规则对象 -->
      <!-- v-model="formModel.username" 给表单元素 绑定form的子属性 -->
      <!-- prop="username" 配置生效的是哪个校验规则（与rules中的字段相对应） -->
      <el-form
        :model="formModel"
        :rules="rules"
        ref="form"
        size="large"
        autocomplete="off"
        v-if="isRegister"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="formModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="formModel.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
            v-model="formModel.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register" class="button" type="primary" auto-insert-space>
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false"> ← 返回 </el-link>
        </el-form-item>
      </el-form>

      <!-- 登录 -->
      <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="formModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="formModel.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true"> 注册 → </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
